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在杨树生理测定及良种选育过程中,经常遇到杨树叶面积的测定工作。开始,每搞一次叶面积测定,就要毁坏几株树。测定的方法是:把它们的树叶分别完全摘下,带回室内按原样描到方格纸或白纸上。再用数方格的方法,或用求积仪进行计算其叶面积。此法麻烦,化费的人力、物力和时间多,尤其是因测定而毁坏了树木,直接影响到科研工作的进展,因此,我们对此项工作进行了改进。
Physiological determination in poplar and breeding process, often encountered in the determination of poplar leaf area. At the outset, each leaf area determination, it is necessary to destroy several trees. Determination of the method is: their leaves were completely removed, respectively, back into the room as described on the graph paper or white paper. Then use a few squares method, or use the plotter to calculate the leaf area. This method is troublesome, cost manpower, material resources and time, especially because the determination of the destruction of the trees, a direct impact on the progress of scientific research, therefore, we made improvements to this work.